Official comment
You can always take over at the end of a flight and land it manually. When starting a mission, one important thing to know is that the location the aircraft is in when it takes off to begin a new mission is defined as the home point which it will return to at the end of flight.
If you fly somewhere manually and then start the mission it will return back to that location at the end whether that is the desired result or not.
We recommend doing the manual takeoff that the warning message suggests (you don't really have to go up to 5 meters) and allowing the app to aircraft it's thing. It goes straight up to the cruising altitude from the launch point.
Landing the aircraft yourself is always a good idea if you want to do it.